JPH0331581B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ink supply amount setting processing device that adjusts and sets the ink supply amount in the width direction of an inking device according to the pattern area ratio for each predetermined width of the printing plate used.

Conventionally, this type of ink supply amount setting processing device inputs data (hereinafter referred to as initial preset data) output from a pattern area ratio meter that measures the area ratio of the ink-applied portion of the printed matter, that is, the pattern area ratio of the printing plate. The initial preset data is converted into a numerical value indicating the position of the doctor blade at each position using a predetermined function, and only the position of the ink key for displacing the doctor blade is automatically set based on the same numerical value.

However, since the conversion function differs depending on the printing press and also depends on the target ink density, it is necessary to prepare a large number of conversion functions in the above method, and the selection mechanism is necessary for the ink. There are disadvantages in that the configuration of the supply amount setting processing device is complicated, and the software is also complicated and expensive.

The present invention uses a predetermined function to convert data obtained by measuring the pattern area ratio for each predetermined width of the printing plate used into adjustment amounts for each of the ink supply amount adjustment mechanisms provided in the width direction of the inking device. , in the ink supply amount setting processing device that sets the ink supply amount by driving the adjustment mechanism according to the converted adjustment amount, the predetermined function is used to set the adjustment amount corresponding to a plurality of arbitrary picture area ratios. The present invention is characterized by having a function setting mechanism that can be set by inputting an input, and its purpose is to provide an ink supply amount setting processing device that overcomes the drawbacks of the conventional methods and is equipped with a mechanism that allows easy setting of a conversion function. This is what we are trying to provide.

The present invention is configured as described above, and when the printing press is changed or the target ink density is different, the relationship between the adjustment amount of the ink supply amount adjustment mechanism corresponding to the picture area ratio in the function setting mechanism A conversion function that matches the characteristics is set by inputting a plurality of points, and the ink supply amount is set using the set conversion function according to the input image area ratio.

In this way, according to the present invention, conversion functions that match various characteristics can be easily set using the function setting mechanism, so it is possible to easily adapt to changes in printing presses or ink density, and it is also possible to easily adapt to changes in printing presses or ink density. This method is simpler in terms of both hardware and software than a method in which a predetermined conversion function is retained and a predetermined one is selected, and it is economically advantageous.

The present invention will now be described in detail with reference to the most preferred embodiment shown in FIGS. 4-6. 1 to 3 show an ink supply amount setting system using an ink supply amount setting processing device according to the present invention. The printing plate pattern area ratio meter 1 is equipped with, for example, a magnetic card reader as a data output device, and the printing plate 4
The picture area ratio is measured for each ink supply area of each ink key, and the magnetic card reader 2 outputs a magnetic card 3 on which the measured data, that is, preset data is recorded. 5 is an ink supply amount setting processing device according to the present invention. 6 is a data reading device, such as a magnetic card reader. 8 is an ink remote control desk. 9 is an inking device of the printing press, a part of which is shown in FIG. 14 is an ink source roller, and an ink source motor 12 is connected to the shaft end of the ink source roller via an ink source roller rotation amount adjustment mechanism 16. The ink source roller rotation amount adjustment mechanism 16 rotates the ink source roller 14 intermittently by a fixed amount per constant rotation of the printing press.This one rotation amount is called the ink source roller rotation amount, and the ink source motor It is adjusted by driving 12. Ink source roller 14
A doctor blade 13 is disposed adjacent to. The doctor blade 13 is composed of a plurality of divided blades 22 groups provided in the width direction. Ink 19 is accumulated in the space formed by the ink source roller 14 and the split blade 22, and the ink source roller 1
4 (in the direction of the arrow in FIG. 1), ink is supplied to the surface of the ink source roller 14 in an amount corresponding to the gap 15 between the tip of the split blade 22 and the ink source roller 14. An ink key 10 is arranged on the back side of each divided blade 22, and the tip of each ink key 10 is connected to the divided blade 2.
It is in contact with 2. Motor 11 connects each ink key 1
When the rotation of the motor 11 is transmitted to the ink key 10 through a gear train, the tip of the ink key 10 moves in and out, thereby displacing the tip of the doctor blade 13 to open and close the gap 15. The ink on the ink source roller 14 is transferred to the ink mixing roller group 18 by the calling roller 17,
The ink is then transferred from an ink roller (not shown) to the pattern area of the printing plate on the printing cylinder and printed on printing paper. The ink source motor and each motor 11 are connected to the ink remote control desk 8 and the supply amount setting processing device 5 by electric wires. The ink density of printed matter is determined by the amount of ink supplied; increasing the amount of ink supplied increases the ink density, and decreasing the amount of ink supplied causes the ink density to become lighter. This ink supply amount will be explained with reference to FIG. The amount of ink supplied from each divided blade 22 per constant rotation of the printing press is determined by the functional relationship between the gap 15, the ink source roller rotation amount 20, and the width 21 of the divided blade 22. Since the width 21 of the divided blade 22 is constant for a certain printing machine, the ink supply amount Z is expressed as a function of the gap X and the ink source roller rotation amount Y as shown in the following equation.

Z=f(X,Y)...(1) As shown in FIG. 3, the conversion function 31 held in the ink supply amount setting processing device 5 inputs the horizontal axis, that is, the pattern area ratio, and outputs the vertical axis. In other words, it is a function that expresses the relationship between the two in terms of the ink key adjustment position. FIG. 4 shows an ink supply amount setting processing device 5' according to this embodiment. The ink supply amount setting processing device 5' is almost the same as the ink supply amount setting processing device 5 shown in FIG. 42
4 is a power panel, 43 is a power switch, 44 is a magnetic card slot, and 40 is an operation panel. The digital switch panel 41 is as shown in FIG. In the figure, Y, M, C, BL are yellow, respectively.
It shows printing units for each color: red, eye, and dark. 45 is a numeric switch (digital switch), and any value can be set. When the numerical switch 45 is set as shown in FIG. 5 for the yellow unit, the conversion function 31 is set as shown in FIG. In other words, here, a straight line approximation is performed between the points specified by the numerical switch. However, the present invention is not limited to this, and a pre-designated curve (for example, a quadratic curve) may be used for approximation.

The present embodiment is configured as described above, and the rotation amount 33 of the ink source roller 14 is set by an appropriate method. The ink key adjustment position 32 corresponding to the appropriate pattern area ratio 34 is set for each color unit by the numerical switch 45, taking into consideration the characteristics of the ink, the characteristics of the dampening device, the characteristics of the ink itself, etc., and the conversion function 31 is set by the device 5. ’. In this state, the operator 7 inputs into the magnetic card reader 6 the magnetic card 3 showing the image area ratio data 30 for each ink supply area of each ink key 10 measured by the printing plate image area ratio meter 1. The ink supply amount setting processing device 5' receives input image area ratio data 3.
0 is converted to each ink key adjustment position 32 by a set conversion function 31, and each ink key motor 11 is
to adjust each clearance. At the same time, the ink source motor 12 is driven so that the ink source roller rotation amount 33 is set, and the ink source roller rotation amount adjustment mechanism 16 is moved to adjust the rotation amount of the ink source roller.

In this way, according to this embodiment, the conversion function can be easily set by setting the numerical switch on the digital switch panel, so conversion can be performed by changing the printing machine, changing the dampening solution, changing the ink, or changing the ink density. Functions can be easily changed, increasing the usability of the ink supply amount setting processing device. Furthermore, the hardware and software are simpler and more economical than conventional ones.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the concept of an ink supply amount setting system to which the ink supply amount setting processing device of the present invention is applied; FIG. 2 is a perspective explanatory diagram showing a partially enlarged ink supply section of FIG. 1; FIG. 3 is a block diagram explaining the operation of FIG. 1, FIGS. 4 to 6 show an ink supply amount setting processing device according to an embodiment of the present invention, and FIG. 4 shows the overall schematic configuration. Perspective view, 5th
This figure is a front view showing the digital switch panel of FIG. 4, and FIG. 6 is an explanatory diagram showing an example of the conversion function set in FIG. 5. 4...Printing plate, 5,5'...Ink supply amount setting processing device, 9...Inking device, 10...Ink key, 11...
Ink key motor, 13...Doctor blade, 30
...Picture area ratio data, 31...Conversion function, 32...Ink key adjustment position.

Claims (1)

[Claims] 1. Using a predetermined function, data obtained by measuring the pattern area ratio for each predetermined width of the printing plate used is converted into adjustment amounts for each of the ink supply amount adjustment mechanisms provided in the width direction of the inking device. In the ink supply amount setting processing device that sets the ink supply amount by driving the adjustment mechanism according to the converted adjustment amount, the predetermined function is inputted with the adjustment amount corresponding to a plurality of arbitrary picture area ratios. An ink supply amount setting processing device characterized by comprising a function setting mechanism that can be set by: